Spring Data Serialization of Embeddable with ManyToOne References
I have an interesting problem. My data-model is the following:
Type A:
@Entity
@JsonIgnoreProperties(ignoreUnknown = true)
public class A {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
}
Type B:
@Entity
@JsonIgnoreProperties(ignoreUnknown = true)
public class B {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
}
Embeddable C:
@Embeddable
@JsonIgnoreProperties(ignoreUnknown = true)
public class C {
@ManyToOne
private A a;
@ManyToOne
private B b;
}
And Type D:
@Entity
@JsonIgnoreProperties(ignoreUnknown = true)
public class D {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
@ElementCollection
@OrderColumn(name = "ORDER_INDEX")
@CollectionTable(
name = "d_c_join",
joinColumns = @JoinColumn(name = "d_id")
)
private List<C> listOfC;
}
Deserialization (and storing) the entities works fine. When an object of class D is serialized the following is the outcome:
{
"_embedded" : {
"ds" : [ {
"id" : 1,
"listOfC" : [ { }, { } ],
"_links" : {
"self" : {
"href" : "http://localhost:8000/ds/1"
}
}
} ]
}
}
How can I configure Spring-Data to serialize A and B in C (best would be by their URI).
I'm pretty positive what you're looking for are Projections. I don't think Spring will serialize referenced collections without it.
See my answer here for more details: Spring Data-Rest POST to sub-resource
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